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Technical Memorandum 2.5 Table of Contents 2.5 Environmental Water Use 2.5.1 Introduction 2.5.2 Water-related Environmental Practices 2.5.2.1 Wyoming State Engineer’s Office Instream Flow Filings 2.5.2.2 U.S. Forest Service Instream Bypasses 2.5.2.3 Minimum Reservoir Releases 2.5.2.4 Water Appropriations for Fish and Wildlife 2.5.3 Environmental Survey 2.5.3.1 Survey Distribution 2.5.3.2 Survey Responses 2.5.4 Cooperative Agreement and Draft Environmental Impact Statement 2.5.4.1 Cooperative Agreement 2.5.4.2 Draft Environmental Impact Statement (DEIS) 2.5.5 Conclusions 2.5.6 References Technical Memorandum 2.5 TC2.5-1 3/24/2005 List of Tables Table 2.5.1. Summary – Wyoming State Engineer’s Office (SEO) instream flow filings in Wyoming’s Platte River Basin Table 2.5.2. Summary – U.S. Forest Service (USFS) instream bypasses Table 2.5.3. Summary – minimum reservoir releases Table 2.5.4. Summary – water appropriations in the Platte River basin for fish and wildlife use Table 2.5.5. Summary – surveyed environmental organizations Technical Memorandum 2.5 TC2.5-2 3/24/2005 List of Figures Figure 2.5.1. Instream flow filing sites – Above Pathfinder Dam subbasin Figure 2.5.2. Instream flow filing sites – Pathfinder to Guernsey subbasin Figure 2.5.3. Instream flow filing sites – Upper Laramie subbasin Figure 2.5.4. Instream bypass sites – Above Pathfinder Dam subbasin Figure 2.5.5. Instream bypass sites – South Platte subbasin Figure 2.5.6. Basin Reservoirs operated to provide minimum or voluntary releases Figure 2.5.7. Fish and wildlife water appropriations Technical Memorandum 2.5 TC2.5-3 3/24/2005 Platte River Basin Water Plan Technical Memorandum 2.5 SUBJECT: Platte River Basin Water Plan Section 2.5 – Environmental Water Use PREPARED BY: Trihydro Corporation DATE: April 1, 2005 PURPOSE: The Platte River Basin Plan is a planning tool developed for the Wyoming Water Development Office. It presents estimated current and estimated future uses of water in Wyoming’s Platte River Basin. The Plan is not used to determine compliance with or administration of state law, federal law, court decrees, interstate compacts, or interstate agreements. 2.5 ENVIRONMENTAL WATER USE 2.5.1 Introduction This technical memorandum describes environmental water use within the Platte River Basin of Wyoming and considers water-related environmental practices in the basin, including Wyoming State Engineer’s Office (SEO) instream flow filings, U.S. Forest Service instream bypasses, and U.S. Bureau of Reclamation (USBR) minimum and voluntary reservoir releases. In addition, this memorandum includes the results of a survey of organizations having an interest in water-related basin environmental issues and a summary of information regarding the Platte River Recovery Implementation Program and Draft Environmental Impact Statement. 2.5.2 Water-related Environmental Practices Environmental water use within the Platte River Basin includes maintenance of minimum stream flow rates and reservoir water levels to protect new and existing fisheries and wildlife habitat. Instream flow filings, instream bypasses, and minimum reservoir releases are three tools used by state and federal agencies to produce and protect fisheries habitat in the Platte River Basin that has been impacted by historical low flow conditions. Due to the non-consumptive nature of environmental water uses, water consumption attributed to environmental use is minimal and is due primarily to evaporative loss. 2.5.2.1 Wyoming State Engineer’s Office Instream Flow Filings In 1986 the Wyoming State Legislature passed House Bill No. 209 leading to the creation of Wyoming Statutes 41-3-1001 through 41-3-1014. These statutes recognize minimum instream flows to establish, maintain, or improve new and existing fisheries as a beneficial use of State Technical Memorandum 2.5 2.5-1 3/7/2005 water. W.S. 41-3-1002(d)(ii) states that any person “may divert and appropriate, as provided by law, instream flow waters for any beneficial use other than for instream flows at the following places: within one (1) mile upstream from any point where the instream flow enters the main stem of the North Platte River.” Establishing instream flow as a beneficial use allows the SEO to grant direct flow and storage water rights to the State of Wyoming solely for the purpose of the creation, enhancement, and protection of fisheries. The Wyoming Water Development Commission (WWDC) has filed 93 applications with the SEO on behalf of the State for minimum instream flow rights state-wide. At the time of this writing, 34 instream flow water rights have been permitted. An instream flow water right is established through a process involving the Wyoming Game and Fish Department (WGF), the Wyoming Water Development Commission (WWDC), and the Wyoming State Engineer’s Office (SEO). WGF is responsible for initial identification of stream segments that need minimum instream flow protection. These stream segments may be presented annually by the WGF to the WWDC. The WWDC is required to file applications with the SEO for instream flow appropriation in stream segments recommended by the WGF. The WWDC is also responsible for evaluating the feasibility of each WGF request for instream flow protection and whether storage is needed to provide the discharge recommended by the WGF. The WWDC provides its findings regarding the feasibility of the appropriation of water for instream flow in a report to the SEO. The SEO is responsible for reviewing the application and feasibility report and either permitting the instream flow water right requested by the WWDC or rejecting the application. The SEO may not issue an instream flow permit when the instream flow right would be included as part of the consumptive share of water allocated to Wyoming in an interstate decree or compact. In addition, the amount of water appropriated under an instream flow right may not result in more water leaving the state than would otherwise be allocated for downstream uses outside Wyoming. As part of the instream flow permitting process, the SEO conducts a public hearing to present information regarding the instream flow application and to receive public comment. A 30-day comment period is normally allowed. If the SEO approves the instream flow permit application, the SEO may place a condition on the permit requiring review of continuation of the permit. Instream flows permitted by the SEO are water rights held in the name of the State of Wyoming. Instream flow rights are administered similarly to other surface water rights granted by the SEO. After senior upstream water rights are satisfied, remaining stream flow is protected for instream purposes when water is available under an instream flow permit. Assuming natural flow is sufficient and senior upstream water rights are met, instream flows are typically satisfied. It is the responsibility of the Wyoming Game and Fish Department (WGF) to recognize when a permitted minimum instream flow is not achieved due to diversions by appropriators with junior water rights. In this event, WGF reports the need for regulation for the benefit of the instream flow water right to the WWDC, who in turn requests (calls for) regulation by the SEO. The SEO will Technical Memorandum 2.5 2.5-2 3/7/2005 then evaluate whether the call for regulation is valid and, if so, will administer the water rights to provide the permitted instream flow. The recommended instream flow may, in some instances, vary by time and season of the year, based on studies completed by the WGF. The basis for recommended minimum flows is described in WGF reports that are attached to instream flow applications that are submitted to the WWDC by WGF. Currently, 12 instream flow filings for stream reaches located within the Platte River Basin have been submitted to the SEO. Information regarding these 12 filings is summarized in Table 2.5.1, and the locations of these 12 stream reaches are shown on Figures 2.5.1, 2.5.2, and 2.5.3. To date, none of the 12 Platte River Basin instream flow application filings have been permitted by the SEO. Technical Memorandum 2.5 2.5-3 3/7/2005 Table 2.5.1 Summary - Wyoming State Engineer's Office (SEO) instream flow filings in Wyoming's Platte River Basin Point of beginning Stream Minimum of minimum Point of ending of reach flow (cubic instream flow minimum instream Hearing length feet per (Section, Township, flow (Section, No. Stream segment held (miles) second) Range) Township, Range) South Fork of the Grand 1 Encampment River yes 13.60 54 10-12-84 13-14-84 2 North Platte River yes 16.00 163 23-12-80 26-14-81 3 Sweetwater River yes 10.20 16-80 17-28-98 34-29-97 4 Lake Creek yes 5.80 0.5 33-14-78 11-13-79 5 Horse Creek yes 0.10 0.2 16-14-79 16-14-79 6 Nugget Gulch Branch yes 0.10 0.2 14-14-79 14-14-79 7 Beaver Creek yes 1.90 0.35 14-14-79 22-14-79 8 Camp Creek yes 1.20 0.2 13-14-79 19-14-78 9 Douglas Creek yes 22.30 5.5 9-14-79 6-13-80 10 Wagonhound Creek no 8.50 1.2-545 31-19-79 6-19-79 Pathfinder to Guernsey subbasin 11 Deer Creek yes 5.00 10-30 11-31-77 T110A-32-77 Upper Laramie subbasin 12 Laramie River yes 3.94 50-100 26-13-77 10-13-77 Source: Wyoming State Engineer's Office, February 17, 2005 e-mail Technical Memorandum 2.5 2.5-4 3/7/2005 Sublette Natrona Fremont Sweetwater River Albany Rawlins Carbon Legend Instream Flow Segments County Boundaries Wagonhound Creek ** NOTE: Nugget Gulch Branch, Horse Creek and Camp Creek segments are too small to be seen at this scale Saratoga Grand Encampment South Fork Grand Encampment River Beaver Creek Lake Creek Douglas Creek North Platte River Figure 2.5.1 Instream Flow Filing Sites Above Pathfinder Dam Subbasin 7 3.5 0 7 Miles Platte River Basin Water Plan Carbon Legend Albany Instream Flow Segments Laramie County Boundaries Laramie River I.F.
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